Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bdf933fd3370b3…

MALICIOUS

PDF

44.9 KB Created: 2021-05-19 17:05:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 777538e998011a663c92594654d9e7a6 SHA-1: 123697b3a10f8d6d31f39098141891b5a36a21d9 SHA-256: c3bdf933fd3370b34517e3bb180c365f0b56b34bbc1827a7fc9ea16ffde02246
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses an MFA/2FA-themed lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/1330123889/pubg-uc-apk-game-hack PDF link annotation
    • https://tokunfome.com.br/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/pokemon-go-windows-free-download_GM1094591345.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004658.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4658 30932 bytes
SHA-256: 755dbe2971885c44d93f2e791da8cc29d5103998763cb0b679eab30b4bc62576
font_01_sfnt_off00008d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D93 18244 bytes
SHA-256: cb2537b8e1ef959a383f88b8685f17fcc10fc2bd9817e28afb6cb39a0eaa6ba0

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